Lamp-socket construction



0. S. SWANSON.

LAMP SOCKET CONSTRUCTION.

APPLSCAUON HLED DEC. l0, 1918.

Patented Apr. 6, 1920.

a. a, l @u 0 7 w 0 a Ww, a wf, J la y@ la 0\ U! 2l Il! 7o 7 J1/wanton Oscar ulwa n sa n 32 I @y1/@ My wom/w13 OSCAR S. SWANSON, OF JAMESTOWN, NEW YORK.

LAMILSOCKET CONSTRUCTION.

Specication of Letters Patent.

Patented Apr. 6, 1920.

Applicatln filed December 10, 1918. Serial No. 266,093.

To all whom i may concern:

Be it known that I, OscAn S. SwANsoN, a citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Lamp-Socket Constructions, of which the following is a specification. v, l

My present iiivention pertains to lamp socket constructirms, and consists in the peculiar and advantageous features of construction in the cap of ,the socket, as hereinafter described and definitely claimed.

In the accompanying draQvings, hereby made a part hereof:

Figure l is an elevation of' a i'liet constructed in accordance with my invention.

Fig. 2 is a diametrical section of' the cap comprised in said socket.

Fig. 3 is an enlarged diametrical section of the metallic portion of' saidicap.

Fig):l 4 is a dilanetrical section otra form of cap designed to receive and be connected to a conduit.

y Fig. 5 is a diametrical section ot' said cap, taken in a plane at right angles to Fig. 4.

Fig. 6 is a side elevation of another modified form of' cap. ,x

Fig. 7 is au enlarged diametrical sectioli of said form.

Fig. 8 is a detail plan view of the neck of' the last-named cap.

Referring by numerals to the said drawings, and more particularly to Figs. l to 2l thereof, l indicates the shell body o'l' a lamp socket construction, and 2 indicates my novel cap. The said cap 2 comprises a metallic portion 3, best shown in Fig. 3, and which may be connected with the shell body 1 in any approved manner without aflecting my invention. 'l`he said metallic. portion 3 is provided with an openingr 4 and with spaced lugs' 5 and (i, which extend upwardly and downwardly, respectively, from the wall of the said opening. rFliese. lugs 5 and G are designed to be embedded in an insulating annulus 7, which rests in the said opening 4, as shown in Figs. 2, and. 5, and inanifestly, by virtue of the said arrangement, the metallic portion 3 and the anuulus 7 are strongly connected of' themselves and at the same time the metallic portion 3 is adequately and permanently insulated from any conductive element that may be disposed in the interior ol the insulating annu'lus. Manifestly the anuulus 7 may be `molded on the metallic portion 3 to receive the lugs 5 and 6.

In the form shown in Figs. 1, 2 and 3, the insulating anuulus is designed for the reception of' wires; and it will be observed by particular reference to Fig. 2 that the said anuulus has a rounded flange 8 at its inner end between which and the adjacent portion of' the metallic element 3 a space 9 is afforded. The said space 5) serves for the reception ol an insulating anuulus 1U, which rests against the inner side of the metallic element Il. The opening in the said anuulus ll) is of' a less diametler than the fiange 8, luid-rom this Yit folloifs that in positioning the anuulus 1U in the metallic element 3 it is necessary tri-crowd said anuulus over the flange 8 until the under edge portion of the annulus is disposed `in the space 9, when the anuulus will manifestly be strongly held between the flange H andfthe metallic element El without the assistance of extraneous means.

The embodiment shown in Figs. 4 and 5 is similar to that shown in Figs. l., 2 and 3, as regards the metallic portion or clement ll, the insulating anuulus` 10. and the manner of connecting the metallic element 3 to the insulating anuulus T, as wc'll as the man nei' ol' securing the insulating anuulus I() between the [lange H1* ol the anuulus 7 and the adjacent portion o'l the metallic element El. 'l`he insulating anuulus T" ol' Figs. 4 and 5 is of larger interior diameter than the an nulus 7 and is provided with a bushing ll 'for the thread engagement of a conduit (not shown). 'l`he said bushing Il is threaded interiorly and cxleriorly and is retained in position in the insulating anuulus 7 by the flanges I2 and lil at the upper and lower ends ol' the. bushing ll. At ll-l the bushing 7 is provided with a screw, which has l'or its purpose to fix the cap to a conduit (not shown). 'lhe said screw ll is threaded in a radial bushing 15, and the said bushing l5 is disposed in the annular neck or-aunulus 7 and has its inner end intel-locked by a. flange. 1G on said end with a [lange [7, pro vided on an annular countersink I8 that is carried by and extends outwardly from the major portion of the. bushing l1. The said countersiuk 18 is disposed in the substance o1 the anuulus 7 and is provided in order to preclude any interference between the inner end of the bushing.; l5 and the conduitJ (not shown) incidental to thc tnrniug of the said conduit; into the hashing l1. in this connection, it will la. noticed that prtazedent; to the Securing ot tho conduit. into the liuShing 11, tho screw 1-l may hc turned ont;- wardly until its inner ond rests in thc countersink l and hoyond thu rirnumitn'ence ol: the major porti/n oll tho` hashing.; ll, and hence their is no liahility of this. arrow intui-leringr with tho turning oll tho ronduit into the hushiwr.

In the niodiltii-ation shown in Figa. t3. T and 8, the metallic tlounnt. it and thi: insulating annulus 1U, and tho. llangu 8" at the inner end ol' the insulating annulns 7l are relatively arrangcd in tho manner be fore spocilioall)Y doSci-ihod and for tht` purpost', hereinlmforo ascrilwd to Said arrangement. It will he. noticed, honi-rrr, in tho last-named enibotlinnnt that thel nictallio element if is proridod with a rollar [laugu 520, in whioh, aro four (more or losa) radial openings 21,; also that tlnA inaulalinn' annulus 'b is providml with :ar throiA radial projnctions 7, which aro disposrd iu tlirno of the openings 21 with a tion' to holding' thu annulus in and strongly connor-t ing the sama to the metallic vlrnnnt. The rtmaining aperture Q1 in thtA collar liangrv )tl :forros 'l'or the reception of a lateral interiori)v threaded Sleeve 22 on a bushing il" that dinposcd in the annnluis 7"; tlw said lateral shawn 2;. serving for the rut-option and tngagonnnt ot' a screw :23 through tho undiinn of whit'h the cap may be fixed upon a conduit or the like. The bushing 11*l is preti-rahly 1uachilled, :i id iS threaded at its innor sido and smooth at its outor Side. Thorolore. in order to contribute to tzho strungth of tho conncction between the said bushing' and the annulus 7", I prefer to crimp thu 0nd porv tioni` of tho bushing il over thi' opposed ends of the anuulus T, as vwill ho rifadily undirstood by toniparison ol Figs, T and H.

lt will lio apparonl; from thc forngroinlnr that in v improvvd lmnp sorlwtvonst'rut'tion is at: once ssiinph.` and iuoxpvusiw, susioptililc ot' oasy production without tho mnploymont of expensive nmrliiuory, and is woll adapted to W'thstand the usano to whirh tho `lamp sog-liet, construrtious and partirularly the 'aps thorcof aro ordinarily sulijut'tod.

As will hu approt'iatcd troni the. iorogoingr. an important Cliaravtiristii' oll my inwntion resides in the fact1 that there is ahsolutely no electrical connai-tion bctxwton tho metallic olcinonl that. carries the insulating armulus, and thtl bushing disposed within tho insulatini;y annulus.

Haring' described my invention, what I t-laini and dcsiru to sucnro hy LotterS-Pat;` unt. istl. cap for use in Ylanip sorltet tonstrtmn tions t-oinprising a ine-tullio clement having an opt-ning and also haring4 lugs extending upwardl)Y and down\\'ardl from the` wall of tho aporturo. :an annular; ot' insulating mattrial arraugi-l in said openintr of tho Inctal li(l oltnnnt and rvroiring said lugs and havin;4 a roundvdllangv holow thv opening lie- Lwwn whil'h and thv adjarvnt portion of tho lnotall'noloniont a sparo is alfordod, and an annulus ol` insulatintIr lnatti'ial arranged in thiA lnotalliit-lvniont and havingits aperlnrr ol' loss dialnotor than the greatest diam-- otur ot thv llaugftou tht,` lirnt-namod annnlns.

"l, A\ rap lor use in lanip sockvt ifonstruc.- tional. comprising' a metallic nnnilwr having an aportar(` :nd also haring! lugs extending upwardl) and donnuardlr lfron: th@ wall of tho apvrtnrt. and an inmilatiiutr annnhnl arraugod in said aporluro and uxtvnding at oppoaitc sidva ot' tlnl aann. and receiving the aid luga` of thv luotallii olonwnt.

5i rap l'or uso in lanlp socket Constructions. comprisinga niet-alli?l element, an insulatingI annulus held to said element, a nivtallinI threaded bushing' disposed. in the annulns and having' a lateral Countersinlr. oxti-nding' outwardly in tho annulus and provided with l flange. Aan intcriorly thrvadcd shawn disposed in tho annulus and haring at its innor und a tiauge interlocked with that ot theY countcrsink, and :t Set svrow diaposod in tho said sluwe.

l. A cap ior une in lanlp sorltot construw tions, comprising` a metallic vlrnicnt having an apoi'tur'and a collar [tango surrounljling thv aprrtlno and also haring' radially disposrd apertures in lwid rollar flange. an4

imulaliug' annnlns diaposrd within thil roh lar llanno and having' radial projections disposed in Imino of thil apr-rturrs thereof. an intvriorl)Y threaded hashing arranged and hold against cndwso inovuunnt in the iinlilatin;` annulus and haring an outwardly uxtrnding inttoriorly thrvadtd sleeve dispoatd in thi` runiaininlgr radial aporture ol" thtcollar tlaugo. and a svt :4i-row hearing in tho said sleeve,

ln testimony4 wheriiot' l aliiX in y signature.

OSCAR S. SlVNSON. 

